fey \FAY\, adjective:
- Possessing or displaying a strange and otherworldly aspect or quality; magical or fairylike; elfin.
- Having power to see into the future; visionary; clairvoyant.
- Appearing slightly crazy, as if under a spell; touched.
- (Scots.) Fated to die; doomed.
- (Scots.) Marked by a sense of approaching death.
Middle English - feie, fated to die, from Old English - fæge
|...and a cold fury rose in him, so that all speech failed him for a while. A fey mood took him.
'Éowyn, Éowyn!' he cried at last. 'Éowyn, how come you here? what madness or devilry is this? Death, death, death! Death take us all!'
|The Return of the King: The Battle of the Pelennor Fields|
I thing that Éomer has covered all the above defintions of fey